Intel D845GBV Technical Product Specification for Intel Desktop Boards using t - Page 39

Instantly Available PC Technology, CAUTION, 13.2.5, 5 V Standby Power Indicator LED, 13.2.6

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Product Description 1.13.2.4 Instantly Available PC Technology CAUTION For Instantly Available PC technology, the +5 V standby line for the power supply must be capable of providing adequate +5 V standby current. Failure to provide adequate standby current when implementing Instantly Available PC technology can damage the power supply.20 Instantly Available PC technology enables the Desktop Boards to enter the ACPI S3 (Suspend-to-RAM) sleep-state. While in the S3 sleep-state, the computer will appear to be off (the power supply is off and the front panel LED is amber if dual colored, or off if single colored.) When signaled by a wake-up device or event, the system quickly returns to its last known wake state. Table 12 on page 36 lists the devices and events that can wake the computer from the S3 state. The Desktop Boards support the PCI Bus Power Management Interface Specification. For information on the version of this specification, see Section 1.4. Add-in boards that also support this specification can participate in power management and can be used to wake the computer. The use of Instantly Available PC technology requires operating system support and PCI 2.2 compliant add-in cards and drivers. 1.13.2.5 +5 V Standby Power Indicator LED The +5 V standby power indicator LED21 shows that power is still present even when the computer appears to be off. CAUTION If AC power has been switched off and the standby power indicator is still lit, disconnect the power cord before installing or removing any devices connected to the board. Failure to do so could damage the board and any attached devices. 1.13.2.6 Resume on Ring The operation of Resume on Ring can be summarized as follows: • Resumes operation from ACPI S1 or S3 states • Detects incoming call similarly for external and internal modems • Requires modem interrupt be unmasked for correct operation 20 Standby current requirements are product dependent. For information on power usage and standby current requirements, refer to the Product Supplement Document for your Intel Desktop Board. 21 The location of the standby power indicator LED is product dependent. For information, refer to the Product Supplement Document for your Desktop Board. 39

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Product Description
39
1.13.2.4
Instantly Available PC Technology
CAUTION
For Instantly Available PC technology, the +5 V standby line for the power supply must be
capable of providing adequate +5 V standby current.
Failure to provide adequate standby current
when implementing Instantly Available PC technology can damage the power supply.
20
Instantly Available PC technology enables the Desktop Boards to enter the ACPI S3
(Suspend-to-RAM) sleep-state.
While in the S3 sleep-state, the computer will appear to be off (the
power supply is off and the front panel LED is amber if dual colored, or off if single colored.)
When signaled by a wake-up device or event, the system quickly returns to its last known wake
state.
Table 12 on page 36 lists the devices and events that can wake the computer from the
S3 state.
The Desktop Boards support the
PCI Bus Power Management Interface Specification
.
For
information on the version of this specification, see Section 1.4.
Add-in boards that also support
this specification can participate in power management and can be used to wake the computer.
The use of Instantly Available PC technology requires operating system support and PCI 2.2
compliant add-in cards and drivers.
1.13.2.5
+5 V Standby Power Indicator LED
The +5 V standby power indicator LED
21
shows that power is still present even when the computer
appears to be off.
CAUTION
If AC power has been switched off and the standby power indicator is still lit, disconnect the power
cord before installing or removing any devices connected to the board.
Failure to do so could
damage the board and any attached devices.
1.13.2.6
Resume on Ring
The operation of Resume on Ring can be summarized as follows:
•
Resumes operation from ACPI S1 or S3 states
•
Detects incoming call similarly for external and internal modems
•
Requires modem interrupt be unmasked for correct operation
20
Standby current requirements are product dependent.
For information on power usage and standby
current requirements, refer to the Product Supplement Document for your Intel Desktop Board.
21
The location of the standby power indicator LED is product dependent.
For information, refer to the
Product Supplement Document for your Desktop Board.